APA (7 वां संस्करण) प्रशस्ति पत्र

Western, D. (1989). Conservation for the twenty-first century. Oxford University Press.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Western, David. Conservation for the Twenty-first Century. New York: Oxford University Press, 1989.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Western, David. Conservation for the Twenty-first Century. Oxford University Press, 1989.